Plaster board



March 9 1926. 1 1,576,142

I J. SCHUMACHER PLASTER BOARD Original Filed v. 14, 1921 BYWMWA/ 71% A TTORNEYS.

Patented Mar. 9, 1926. 1

UHTED STATES PATET JOHN SCHUMAGHEB OF LOS ANGELES, CALIRDRNIA.

rnes'r in n roam).

original application tiled November 14, 1921, Serial No. 514,914, Divided and this application med April 13,- 1925. Serifilli'o. 22,583.

To all whomit may concern: Referring more particularly to the figure Be it known that 1, JOHN SOH'UMAQHER, a board is shown comprising a plasterer core a citizen of the United States, and resident 1 disposed between cover sheets 2 and 3. I

of Los Angeles, in the county of Los Anprefer to use a moist unstable plastic sulit geles and State of California, have invented stance, which may be fed between continuncw and useful Improvements in Plaster ously advancing sheets of paper. The side Board, of which the following is a specifimargins of the paper sheets are turned incation. wardly' at acute angles and embedded in This invention relates to a plaster. board the plaster leaving the end faces exposed.

10 formed of a plaster core and covering sheets. The product in its soft condition is cut into Such boards are commonly used for coverinitial lengths. In settingand drying, the ing Walls in building constructions. The paper adheres to the plaster core 1. The present application is a division of applicaend faces are in effect completely exposed tion Ser. No. 514,914, filed November 14, forming a faeepermitting an adherence of 15 1921. the joint filler used between sections. The

It is the primary object of this invention edges of the paper are embedded in the pins to provide a board which is reinforced at ter core and form a reinforcement which thd edges, and with the covering sheets so strengthens the board. There is no opporarranged that they are securely attached to tunity for the board to start peeling at the 20 the plaster core at their edges, thereby preedge, as the edge of the paper is embedded venting the sheets from being accidentally in the plaster so as to anchor them securely. pulled away. from the plaster or torn at the What I claim is: v edges in handling. It is another object of A plaster board comprising a plaster havthis invention to provide a board so reining covering sheets adhering to the outer 95 forced at' its edges, that it will not chip. It faces thereof and folded back at an acute is a further object, of this invention to proangle at the junctions of the side edges and vide a board of the character described hav faces of the board so asto cover the corner ing a full width exposure of the plaster core edges thereof, the extreme ends of the said at the edges, so as to provide for better adsheets being folded into and embedded in 65 herence of joint cement. I the plaster so as to expose the plaster at the Other objects and corresponding aocomend faces for the full thickness of the board. lishments will be apparent from the sub- In witness that I claim the foregoing I oined specification and drawing accomhave hereunto subscribed my name this 6th panying the specification, in which: The day of April 1925. figure shows in perspective one type of board embodying my invention. JOHN SCHUMACHER. 

